lustre/llite/namei.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #include <linux/fs.h>
  38 #include <linux/sched.h>
  39 #include <linux/mm.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/quotaops.h>
  42 #include <linux/highmem.h>
  43 #include <linux/pagemap.h>
  44
  45 #define DEBUG_SUBSYSTEM S_LLITE
  46
  47 #include <obd_support.h>
  48 #include <lustre_fid.h>
  49 #include <lustre_lite.h>
  50 #include <lustre_dlm.h>
  51 #include <lustre_ver.h>
  52 #include <lustre_mdc.h>
  53 #include "llite_internal.h"
  54
  55 /*
  56  * Check if we have something mounted at the named dchild.
  57  * In such a case there would always be dentry present.
  58  */
  59 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  60                            struct qstr *name)
  61 {
  62         int mounted = 0;
  63
  64         if (unlikely(dchild)) {
  65                 mounted = d_mountpoint(dchild);
  66         } else if (dparent) {
  67                 dchild = d_lookup(dparent, name);
  68                 if (dchild) {
  69                         mounted = d_mountpoint(dchild);
  70                         dput(dchild);
  71                 }
  72         }
  73         return mounted;
  74 }
  75
  76 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  77 {
  78         ENTRY;
  79
  80         ldlm_lock_decref(lockh, mode);
  81
  82         RETURN(0);
  83 }
  84
  85
  86 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  87 static int ll_test_inode(struct inode *inode, void *opaque)
  88 {
  89         struct ll_inode_info *lli = ll_i2info(inode);
  90         struct lustre_md     *md = opaque;
  91
  92         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  93                 CERROR("MDS body missing FID\n");
  94                 return 0;
  95         }
  96
  97         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
  98                 return 0;
  99
 100         return 1;
 101 }
 102
 103 static int ll_set_inode(struct inode *inode, void *opaque)
 104 {
 105         return 0;
 106 }
 107
 108
 109 /*
 110  * Get an inode by inode number (already instantiated by the intent lookup).
 111  * Returns inode or NULL
 112  */
 113 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 114                       struct lustre_md *md)
 115 {
 116         struct ll_inode_info *lli;
 117         struct inode         *inode;
 118         ENTRY;
 119
 120         LASSERT(hash != 0);
 121         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 122
 123         if (inode) {
 124                 lli = ll_i2info(inode);
 125                 if (inode->i_state & I_NEW) {
 126                         int rc;
 127
 128                         ll_read_inode2(inode, md);
 129                         rc = cl_inode_init(inode, md);
 130                         if (rc != 0) {
 131                                 md->lsm = NULL;
 132                                 make_bad_inode(inode);
 133                                 unlock_new_inode(inode);
 134                                 iput(inode);
 135                                 inode = ERR_PTR(rc);
 136                         } else
 137                                 unlock_new_inode(inode);
 138                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 139                                 ll_update_inode(inode, md);
 140                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 141                        inode, PFID(&md->body->fid1));
 142         }
 143         RETURN(inode);
 144 }
 145
 146 static void ll_drop_negative_dentry(struct inode *dir)
 147 {
 148         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 149
 150         spin_lock(&ll_lookup_lock);
 151         spin_lock(&dcache_lock);
 152 restart:
 153         list_for_each_entry_safe(dentry, tmp_alias,
 154                                  &dir->i_dentry,d_alias) {
 155                 if (!list_empty(&dentry->d_subdirs)) {
 156                         struct dentry *child;
 157                         list_for_each_entry_safe(child, tmp_subdir,
 158                                                  &dentry->d_subdirs,
 159                                                  d_child) {
 160                                 /* XXX Print some debug here? */
 161                                 if (!child->d_inode)
 162                                 /* Negative dentry. If we were
 163                                    dropping dcache lock, go
 164                                    throught the list again */
 165                                         if (ll_drop_dentry(child))
 166                                                 goto restart;
 167                         }
 168                 }
 169         }
 170         spin_unlock(&dcache_lock);
 171         spin_unlock(&ll_lookup_lock);
 172 }
 173
 174
 175 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 176                        void *data, int flag)
 177 {
 178         int rc;
 179         struct lustre_handle lockh;
 180         ENTRY;
 181
 182         switch (flag) {
 183         case LDLM_CB_BLOCKING:
 184                 ldlm_lock2handle(lock, &lockh);
 185                 rc = ldlm_cli_cancel(&lockh);
 186                 if (rc < 0) {
 187                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 188                         RETURN(rc);
 189                 }
 190                 break;
 191         case LDLM_CB_CANCELING: {
 192                 struct inode *inode = ll_inode_from_lock(lock);
 193                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 194                 struct lu_fid *fid;
 195
 196                 /* Invalidate all dentries associated with this inode */
 197                 if (inode == NULL)
 198                         break;
 199
 200                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 201                 if ((bits & MDS_INODELOCK_LOOKUP) &&
 202                     ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
 203                         bits &= ~MDS_INODELOCK_LOOKUP;
 204                 if ((bits & MDS_INODELOCK_UPDATE) &&
 205                     ll_have_md_lock(inode, MDS_INODELOCK_UPDATE))
 206                         bits &= ~MDS_INODELOCK_UPDATE;
 207                 if ((bits & MDS_INODELOCK_OPEN) &&
 208                     ll_have_md_lock(inode, MDS_INODELOCK_OPEN))
 209                         bits &= ~MDS_INODELOCK_OPEN;
 210
 211                 fid = ll_inode2fid(inode);
 212                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 213                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 214                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 215                         LDLM_ERROR(lock, "data mismatch with object "
 216                                    DFID" (%p)", PFID(fid), inode);
 217                 }
 218
 219                 if (bits & MDS_INODELOCK_OPEN) {
 220                         int flags = 0;
 221                         switch (lock->l_req_mode) {
 222                         case LCK_CW:
 223                                 flags = FMODE_WRITE;
 224                                 break;
 225                         case LCK_PR:
 226                                 flags = FMODE_EXEC;
 227                                 break;
 228                         case LCK_CR:
 229                                 flags = FMODE_READ;
 230                                 break;
 231                         default:
 232                                 CERROR("Unexpected lock mode for OPEN lock "
 233                                        "%d, inode %ld\n", lock->l_req_mode,
 234                                        inode->i_ino);
 235                         }
 236                         ll_md_real_close(inode, flags);
 237                 }
 238
 239                 if (bits & MDS_INODELOCK_UPDATE)
 240                         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 241
 242                 if (S_ISDIR(inode->i_mode) &&
 243                      (bits & MDS_INODELOCK_UPDATE)) {
 244                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 245                                inode->i_ino);
 246                         truncate_inode_pages(inode->i_mapping, 0);
 247                         ll_drop_negative_dentry(inode);
 248                 }
 249
 250                 if (inode->i_sb->s_root &&
 251                     inode != inode->i_sb->s_root->d_inode &&
 252                     (bits & MDS_INODELOCK_LOOKUP))
 253                         ll_unhash_aliases(inode);
 254                 iput(inode);
 255                 break;
 256         }
 257         default:
 258                 LBUG();
 259         }
 260
 261         RETURN(0);
 262 }
 263
 264 __u32 ll_i2suppgid(struct inode *i)
 265 {
 266         if (in_group_p(i->i_gid))
 267                 return (__u32)i->i_gid;
 268         else
 269                 return (__u32)(-1);
 270 }
 271
 272 /* Pack the required supplementary groups into the supplied groups array.
 273  * If we don't need to use the groups from the target inode(s) then we
 274  * instead pack one or more groups from the user's supplementary group
 275  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 276 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 277 {
 278 #if 0
 279         int i;
 280 #endif
 281
 282         LASSERT(i1 != NULL);
 283         LASSERT(suppgids != NULL);
 284
 285         suppgids[0] = ll_i2suppgid(i1);
 286
 287         if (i2)
 288                 suppgids[1] = ll_i2suppgid(i2);
 289                 else
 290                         suppgids[1] = -1;
 291
 292 #if 0
 293         for (i = 0; i < current_ngroups; i++) {
 294                 if (suppgids[0] == -1) {
 295                         if (current_groups[i] != suppgids[1])
 296                                 suppgids[0] = current_groups[i];
 297                         continue;
 298                 }
 299                 if (suppgids[1] == -1) {
 300                         if (current_groups[i] != suppgids[0])
 301                                 suppgids[1] = current_groups[i];
 302                         continue;
 303                 }
 304                 break;
 305         }
 306 #endif
 307 }
 308
 309 static void ll_d_add(struct dentry *de, struct inode *inode)
 310 {
 311         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 312         /* d_instantiate */
 313         if (!list_empty(&de->d_alias)) {
 314                 spin_unlock(&dcache_lock);
 315                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 316                        de->d_name.len, de->d_name.name, de,
 317                        de->d_alias.next, de->d_alias.prev);
 318                 LBUG();
 319         }
 320         if (inode)
 321                 list_add(&de->d_alias, &inode->i_dentry);
 322         de->d_inode = inode;
 323
 324         /* d_rehash */
 325         if (!d_unhashed(de)) {
 326                 spin_unlock(&dcache_lock);
 327                 CERROR("dentry %.*s %p hash next %p\n",
 328                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 329                 LBUG();
 330         }
 331         d_rehash_cond(de, 0);
 332 }
 333
 334 /* Search "inode"'s alias list for a dentry that has the same name and parent
 335  * as de.  If found, return it.  If not found, return de.
 336  * Lustre can't use d_add_unique because don't unhash aliases for directory
 337  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 338  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 339  */
 340 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 341 {
 342         struct list_head *tmp;
 343         struct dentry *dentry;
 344         struct dentry *last_discon = NULL;
 345
 346         spin_lock(&ll_lookup_lock);
 347         spin_lock(&dcache_lock);
 348         list_for_each(tmp, &inode->i_dentry) {
 349                 dentry = list_entry(tmp, struct dentry, d_alias);
 350
 351                 /* We are called here with 'de' already on the aliases list. */
 352                 if (unlikely(dentry == de)) {
 353                         CERROR("whoops\n");
 354                         continue;
 355                 }
 356
 357                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 358                         LASSERT(last_discon == NULL);
 359                         last_discon = dentry;
 360                         continue;
 361                 }
 362
 363                 if (dentry->d_parent != de->d_parent)
 364                         continue;
 365
 366                 if (dentry->d_name.hash != de->d_name.hash)
 367                         continue;
 368
 369                 if (dentry->d_name.len != de->d_name.len)
 370                         continue;
 371
 372                 if (memcmp(dentry->d_name.name, de->d_name.name,
 373                            de->d_name.len) != 0)
 374                         continue;
 375
 376                 dget_locked(dentry);
 377                 lock_dentry(dentry);
 378                 __d_drop(dentry);
 379 #ifdef DCACHE_LUSTRE_INVALID
 380                 dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
 381 #endif
 382                 unlock_dentry(dentry);
 383                 ll_dops_init(dentry, 0);
 384                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
 385                 spin_unlock(&dcache_lock);
 386                 spin_unlock(&ll_lookup_lock);
 387                 iput(inode);
 388                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 389                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 390                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 391                 return dentry;
 392         }
 393
 394         if (last_discon) {
 395                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 396                         "refc %d\n", last_discon, last_discon->d_inode,
 397                         atomic_read(&last_discon->d_count));
 398                 dget_locked(last_discon);
 399                 spin_unlock(&dcache_lock);
 400                 spin_unlock(&ll_lookup_lock);
 401                 ll_dops_init(last_discon, 1);
 402                 d_rehash(de);
 403                 d_move(last_discon, de);
 404                 iput(inode);
 405                 return last_discon;
 406         }
 407
 408         ll_d_add(de, inode);
 409
 410         spin_unlock(&dcache_lock);
 411         spin_unlock(&ll_lookup_lock);
 412
 413         return de;
 414 }
 415
 416 int ll_lookup_it_finish(struct ptlrpc_request *request,
 417                      struct lookup_intent *it, void *data)
 418 {
 419         struct it_cb_data *icbd = data;
 420         struct dentry **de = icbd->icbd_childp;
 421         struct inode *parent = icbd->icbd_parent;
 422         struct ll_sb_info *sbi = ll_i2sbi(parent);
 423         struct inode *inode = NULL;
 424         int rc;
 425         ENTRY;
 426
 427         /* NB 1 request reference will be taken away by ll_intent_lock()
 428          * when I return */
 429         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 430                 struct dentry *save = *de;
 431
 432                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 433                 if (rc)
 434                         RETURN(rc);
 435
 436                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 437                        inode, inode->i_ino, inode->i_generation);
 438                 md_set_lock_data(sbi->ll_md_exp,
 439                                  &it->d.lustre.it_lock_handle, inode);
 440
 441                 /* We used to query real size from OSTs here, but actually
 442                    this is not needed. For stat() calls size would be updated
 443                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 444                    2.4 and
 445                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 446                    Everybody else who needs correct file size would call
 447                    cl_glimpse_size or some equivalent themselves anyway.
 448                    Also see bug 7198. */
 449
 450                 ll_dops_init(*de, 1);
 451                 *de = ll_find_alias(inode, *de);
 452                 if (*de != save) {
 453                         struct ll_dentry_data *lld = ll_d2d(*de);
 454
 455                         /* just make sure the ll_dentry_data is ready */
 456                         if (unlikely(lld == NULL)) {
 457                                 ll_set_dd(*de);
 458                                 lld = ll_d2d(*de);
 459                                 if (likely(lld != NULL))
 460                                         lld->lld_sa_generation = 0;
 461                         }
 462                 }
 463         } else {
 464                 ll_dops_init(*de, 1);
 465                 /* Check that parent has UPDATE lock. If there is none, we
 466                    cannot afford to hash this dentry (done by ll_d_add) as it
 467                    might get picked up later when UPDATE lock will appear */
 468                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
 469                         spin_lock(&dcache_lock);
 470                         ll_d_add(*de, NULL);
 471                         spin_unlock(&dcache_lock);
 472                 } else {
 473                         (*de)->d_inode = NULL;
 474                         /* We do not want to hash the dentry if don`t have a
 475                          * lock, but if this dentry is later used in d_move,
 476                          * we'd hit uninitialised list head d_hash, so we just
 477                          * do this to init d_hash field but leave dentry
 478                          * unhashed. (bug 10796). */
 479                         d_rehash(*de);
 480                         d_drop(*de);
 481                 }
 482         }
 483
 484         RETURN(0);
 485 }
 486
 487 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 488                                    struct lookup_intent *it, int lookup_flags)
 489 {
 490         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 491         struct dentry *save = dentry, *retval;
 492         struct ptlrpc_request *req = NULL;
 493         struct md_op_data *op_data;
 494         struct it_cb_data icbd;
 495         __u32 opc;
 496         int rc, first = 0;
 497         ENTRY;
 498
 499         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 500                 RETURN(ERR_PTR(-ENAMETOOLONG));
 501
 502         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 503                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 504                parent->i_generation, parent, LL_IT2STR(it));
 505
 506         if (d_mountpoint(dentry))
 507                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 508
 509         ll_frob_intent(&it, &lookup_it);
 510
 511         /* As do_lookup is called before follow_mount, root dentry may be left
 512          * not valid, revalidate it here. */
 513         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 514             (it->it_op & (IT_OPEN | IT_CREAT))) {
 515                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 516                 if (rc)
 517                         RETURN(ERR_PTR(rc));
 518         }
 519
 520         if (it->it_op == IT_GETATTR) {
 521                 first = ll_statahead_enter(parent, &dentry, 1);
 522                 if (first >= 0) {
 523                         ll_statahead_exit(dentry, first);
 524                         if (first == 1)
 525                                 RETURN(retval = dentry);
 526                 }
 527         }
 528
 529         icbd.icbd_childp = &dentry;
 530         icbd.icbd_parent = parent;
 531
 532         if (it->it_op & IT_CREAT ||
 533             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 534                 opc = LUSTRE_OPC_CREATE;
 535         else
 536                 opc = LUSTRE_OPC_ANY;
 537
 538         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 539                                      dentry->d_name.len, lookup_flags, opc,
 540                                      NULL);
 541         if (IS_ERR(op_data))
 542                 RETURN((void *)op_data);
 543
 544         it->it_create_mode &= ~current->fs->umask;
 545
 546         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 547                             lookup_flags, &req, ll_md_blocking_ast, 0);
 548         ll_finish_md_op_data(op_data);
 549         if (rc < 0)
 550                 GOTO(out, retval = ERR_PTR(rc));
 551
 552         rc = ll_lookup_it_finish(req, it, &icbd);
 553         if (rc != 0) {
 554                 ll_intent_release(it);
 555                 GOTO(out, retval = ERR_PTR(rc));
 556         }
 557
 558         if (first == -EEXIST)
 559                 ll_statahead_mark(dentry);
 560
 561         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 562             !S_ISREG(dentry->d_inode->i_mode) &&
 563             !S_ISDIR(dentry->d_inode->i_mode)) {
 564                 ll_release_openhandle(dentry, it);
 565         }
 566         ll_lookup_finish_locks(it, dentry);
 567
 568         if (dentry == save)
 569                 GOTO(out, retval = NULL);
 570         else
 571                 GOTO(out, retval = dentry);
 572  out:
 573         if (req)
 574                 ptlrpc_req_finished(req);
 575         return retval;
 576 }
 577
 578 #ifdef HAVE_VFS_INTENT_PATCHES
 579 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 580                                    struct nameidata *nd)
 581 {
 582         struct dentry *de;
 583         ENTRY;
 584
 585         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 586                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 587         else
 588                 de = ll_lookup_it(parent, dentry, NULL, 0);
 589
 590         RETURN(de);
 591 }
 592 #else
 593 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 594                                         int lookup_flags)
 595 {
 596         struct lookup_intent *it;
 597
 598         OBD_ALLOC(it, sizeof(*it));
 599         if (!it)
 600                 return ERR_PTR(-ENOMEM);
 601
 602         if (lookup_flags & LOOKUP_OPEN) {
 603                 it->it_op = IT_OPEN;
 604                 if (lookup_flags & LOOKUP_CREATE)
 605                         it->it_op |= IT_CREAT;
 606                 it->it_create_mode = oit->create_mode;
 607                 it->it_flags = oit->flags;
 608         } else {
 609                 it->it_op = IT_GETATTR;
 610         }
 611
 612 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 613                 /* Since there is no way to pass our intent to ll_file_open,
 614                  * just check the file is there. Actual open will be done
 615                  * in ll_file_open */
 616                 if (it->it_op & IT_OPEN)
 617                         it->it_op = IT_LOOKUP;
 618 #endif
 619
 620         return it;
 621 }
 622
 623 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 624                                    struct nameidata *nd)
 625 {
 626         struct dentry *de;
 627         ENTRY;
 628
 629         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 630                 struct lookup_intent *it;
 631
 632 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 633                 /* Did we came here from failed revalidate just to propagate
 634                  * its error? */
 635                 if (nd->flags & LOOKUP_OPEN)
 636                         if (IS_ERR(nd->intent.open.file))
 637                                 RETURN((struct dentry *)nd->intent.open.file);
 638 #endif
 639
 640                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 641                         it = ll_d2d(dentry)->lld_it;
 642                         ll_d2d(dentry)->lld_it = NULL;
 643                 } else {
 644                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 645                         if (IS_ERR(it))
 646                                 RETURN((struct dentry *)it);
 647                 }
 648
 649                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 650                 if (de)
 651                         dentry = de;
 652                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 653                         if (dentry->d_inode &&
 654                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 655 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 656                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 657                                         // We cannot call open here as it would
 658                                         // deadlock.
 659                                         ptlrpc_req_finished(
 660                                                        (struct ptlrpc_request *)
 661                                                           it->d.lustre.it_data);
 662                                 } else {
 663                                         struct file *filp;
 664                                         nd->intent.open.file->private_data = it;
 665                                         filp =lookup_instantiate_filp(nd,dentry,
 666                                                                       NULL);
 667 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 668 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 669  * nd->intent.open.file for error, so we need to return it as lookup's result
 670  * instead */
 671                                         if (IS_ERR(filp)) {
 672                                                 if (de)
 673                                                         dput(de);
 674                                                 de = (struct dentry *) filp;
 675                                         }
 676 #endif
 677
 678                                 }
 679 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 680                                 /* Release open handle as we have no way to
 681                                  * pass it to ll_file_open */
 682                                 ll_release_openhandle(dentry, it);
 683 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 684                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 685                                 // XXX This can only reliably work on assumption
 686                                 // that there are NO hashed negative dentries.
 687                                 ll_d2d(dentry)->lld_it = it;
 688                                 it = NULL; /* Will be freed in ll_create_nd */
 689                                 /* We absolutely depend on ll_create_nd to be
 690                                  * called to not leak this intent and possible
 691                                  * data attached to it */
 692                         }
 693                 }
 694
 695                 if (it) {
 696                         ll_intent_release(it);
 697                         OBD_FREE(it, sizeof(*it));
 698                 }
 699         } else {
 700                 de = ll_lookup_it(parent, dentry, NULL, 0);
 701         }
 702
 703         RETURN(de);
 704 }
 705 #endif
 706
 707 /* We depend on "mode" being set with the proper file type/umask by now */
 708 static struct inode *ll_create_node(struct inode *dir, const char *name,
 709                                     int namelen, const void *data, int datalen,
 710                                     int mode, __u64 extra,
 711                                     struct lookup_intent *it)
 712 {
 713         struct inode *inode = NULL;
 714         struct ptlrpc_request *request = NULL;
 715         struct ll_sb_info *sbi = ll_i2sbi(dir);
 716         int rc;
 717         ENTRY;
 718
 719         LASSERT(it && it->d.lustre.it_disposition);
 720
 721         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 722         request = it->d.lustre.it_data;
 723         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 724         rc = ll_prep_inode(&inode, request, dir->i_sb);
 725         if (rc)
 726                 GOTO(out, inode = ERR_PTR(rc));
 727
 728         LASSERT(list_empty(&inode->i_dentry));
 729
 730         /* We asked for a lock on the directory, but were granted a
 731          * lock on the inode.  Since we finally have an inode pointer,
 732          * stuff it in the lock. */
 733         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 734                inode, inode->i_ino, inode->i_generation);
 735         md_set_lock_data(sbi->ll_md_exp,
 736                          &it->d.lustre.it_lock_handle, inode);
 737         EXIT;
 738  out:
 739         ptlrpc_req_finished(request);
 740         return inode;
 741 }
 742
 743 /*
 744  * By the time this is called, we already have created the directory cache
 745  * entry for the new file, but it is so far negative - it has no inode.
 746  *
 747  * We defer creating the OBD object(s) until open, to keep the intent and
 748  * non-intent code paths similar, and also because we do not have the MDS
 749  * inode number before calling ll_create_node() (which is needed for LOV),
 750  * so we would need to do yet another RPC to the MDS to store the LOV EA
 751  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 752  * lmm_size in datalen (the MDS still has code which will handle that).
 753  *
 754  * If the create succeeds, we fill in the inode information
 755  * with d_instantiate().
 756  */
 757 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 758                         struct lookup_intent *it)
 759 {
 760         struct inode *inode;
 761         int rc = 0;
 762         ENTRY;
 763
 764         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 765                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 766                dir->i_generation, dir, LL_IT2STR(it));
 767
 768         rc = it_open_error(DISP_OPEN_CREATE, it);
 769         if (rc)
 770                 RETURN(rc);
 771
 772         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 773                                NULL, 0, mode, 0, it);
 774         if (IS_ERR(inode)) {
 775                 RETURN(PTR_ERR(inode));
 776         }
 777
 778         d_instantiate(dentry, inode);
 779         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 780          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 781          * successful create. Hash it here. */
 782         spin_lock(&dcache_lock);
 783         if (d_unhashed(dentry))
 784                 d_rehash_cond(dentry, 0);
 785         spin_unlock(&dcache_lock);
 786         RETURN(0);
 787 }
 788
 789 static void ll_update_times(struct ptlrpc_request *request,
 790                             struct inode *inode)
 791 {
 792         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 793                                                        &RMF_MDT_BODY);
 794
 795         LASSERT(body);
 796         /* mtime is always updated with ctime, but can be set in past.
 797            As write and utime(2) may happen within 1 second, and utime's
 798            mtime has a priority over write's one, so take mtime from mds
 799            for the same ctimes. */
 800         if (body->valid & OBD_MD_FLCTIME &&
 801             body->ctime >= LTIME_S(inode->i_ctime)) {
 802                 LTIME_S(inode->i_ctime) = body->ctime;
 803
 804                 if (body->valid & OBD_MD_FLMTIME) {
 805                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
 806                                "to "LPU64"\n", inode->i_ino,
 807                                LTIME_S(inode->i_mtime), body->mtime);
 808                         LTIME_S(inode->i_mtime) = body->mtime;
 809                 }
 810         }
 811 }
 812
 813 static int ll_new_node(struct inode *dir, struct qstr *name,
 814                        const char *tgt, int mode, int rdev,
 815                        struct dentry *dchild, __u32 opc)
 816 {
 817         struct ptlrpc_request *request = NULL;
 818         struct md_op_data *op_data;
 819         struct inode *inode = NULL;
 820         struct ll_sb_info *sbi = ll_i2sbi(dir);
 821         int tgt_len = 0;
 822         int err;
 823
 824         ENTRY;
 825         if (unlikely(tgt != NULL))
 826                 tgt_len = strlen(tgt) + 1;
 827
 828         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 829                                      name->len, 0, opc, NULL);
 830         if (IS_ERR(op_data))
 831                 GOTO(err_exit, err = PTR_ERR(op_data));
 832
 833         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 834                         current->fsuid, current->fsgid,
 835                         cfs_curproc_cap_pack(), rdev, &request);
 836         ll_finish_md_op_data(op_data);
 837         if (err)
 838                 GOTO(err_exit, err);
 839
 840         ll_update_times(request, dir);
 841
 842         if (dchild) {
 843                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 844                 if (err)
 845                      GOTO(err_exit, err);
 846
 847                 d_drop(dchild);
 848                 d_instantiate(dchild, inode);
 849                 EXIT;
 850         }
 851 err_exit:
 852         ptlrpc_req_finished(request);
 853
 854         return err;
 855 }
 856
 857 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 858                             unsigned rdev, struct dentry *dchild)
 859 {
 860         int err;
 861         ENTRY;
 862
 863         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 864                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 865                mode, rdev);
 866
 867         mode &= ~current->fs->umask;
 868
 869         switch (mode & S_IFMT) {
 870         case 0:
 871                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 872         case S_IFREG:
 873         case S_IFCHR:
 874         case S_IFBLK:
 875         case S_IFIFO:
 876         case S_IFSOCK:
 877                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 878                                   LUSTRE_OPC_MKNOD);
 879                 break;
 880         case S_IFDIR:
 881                 err = -EPERM;
 882                 break;
 883         default:
 884                 err = -EINVAL;
 885         }
 886         RETURN(err);
 887 }
 888
 889 #ifndef HAVE_VFS_INTENT_PATCHES
 890 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 891                         int mode, struct nameidata *nd)
 892 {
 893         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 894         int rc;
 895
 896         if (!it)
 897                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 898
 899         ll_d2d(dentry)->lld_it = NULL;
 900
 901         /* Was there an error? Propagate it! */
 902         if (it->d.lustre.it_status) {
 903                 rc = it->d.lustre.it_status;
 904                 goto out;
 905         }
 906
 907         rc = ll_create_it(dir, dentry, mode, it);
 908 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 909         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 910                 nd->intent.open.file->private_data = it;
 911                 lookup_instantiate_filp(nd, dentry, NULL);
 912         }
 913 #else
 914         ll_release_openhandle(dentry,it);
 915 #endif
 916
 917 out:
 918         ll_intent_release(it);
 919         OBD_FREE(it, sizeof(*it));
 920
 921         return rc;
 922 }
 923 #else
 924 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 925                         int mode, struct nameidata *nd)
 926 {
 927         if (!nd || !nd->intent.d.lustre.it_disposition)
 928                 /* No saved request? Just mknod the file */
 929                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 930
 931         return ll_create_it(dir, dentry, mode, &nd->intent);
 932 }
 933 #endif
 934
 935 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 936                               const char *tgt, struct dentry *dchild)
 937 {
 938         int err;
 939         ENTRY;
 940
 941         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 942                name->len, name->name, dir->i_ino, dir->i_generation,
 943                dir, 3000, tgt);
 944
 945         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 946                           0, dchild, LUSTRE_OPC_SYMLINK);
 947         RETURN(err);
 948 }
 949
 950 static int ll_link_generic(struct inode *src,  struct inode *dir,
 951                            struct qstr *name, struct dentry *dchild)
 952 {
 953         struct ll_sb_info *sbi = ll_i2sbi(dir);
 954         struct ptlrpc_request *request = NULL;
 955         struct md_op_data *op_data;
 956         int err;
 957
 958         ENTRY;
 959         CDEBUG(D_VFSTRACE,
 960                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 961                src->i_ino, src->i_generation, src, dir->i_ino,
 962                dir->i_generation, dir, name->len, name->name);
 963
 964         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 965                                      0, LUSTRE_OPC_ANY, NULL);
 966         if (IS_ERR(op_data))
 967                 RETURN(PTR_ERR(op_data));
 968
 969         err = md_link(sbi->ll_md_exp, op_data, &request);
 970         ll_finish_md_op_data(op_data);
 971         if (err)
 972                 GOTO(out, err);
 973         if (dchild)
 974                 d_drop(dchild);
 975
 976         ll_update_times(request, dir);
 977         EXIT;
 978 out:
 979         ptlrpc_req_finished(request);
 980         RETURN(err);
 981 }
 982
 983 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 984                             int mode, struct dentry *dchild)
 985
 986 {
 987         int err;
 988         ENTRY;
 989
 990         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 991                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 992
 993         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 994         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 995
 996         RETURN(err);
 997 }
 998
 999 /* Try to find the child dentry by its name.
1000    If found, put the result fid into @fid. */
1001 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1002                              struct lu_fid *fid)
1003 {
1004         struct dentry *parent, *child;
1005
1006         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1007         child = d_lookup(parent, name);
1008         if (child) {
1009                 if (child->d_inode)
1010                         *fid = *ll_inode2fid(child->d_inode);
1011                 dput(child);
1012         }
1013 }
1014
1015 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1016                             struct dentry *dchild, struct qstr *name)
1017 {
1018         struct ptlrpc_request *request = NULL;
1019         struct md_op_data *op_data;
1020         int rc;
1021         ENTRY;
1022
1023         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1024                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1025
1026         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1027                 RETURN(-EBUSY);
1028
1029         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1030                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1031         if (IS_ERR(op_data))
1032                 RETURN(PTR_ERR(op_data));
1033
1034         ll_get_child_fid(dir, name, &op_data->op_fid3);
1035         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1036         ll_finish_md_op_data(op_data);
1037         if (rc == 0)
1038                 ll_update_times(request, dir);
1039         ptlrpc_req_finished(request);
1040         RETURN(rc);
1041 }
1042
1043 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1044 {
1045         struct mdt_body *body;
1046         struct lov_mds_md *eadata;
1047         struct lov_stripe_md *lsm = NULL;
1048         struct obd_trans_info oti = { 0 };
1049         struct obdo *oa;
1050         int rc;
1051         ENTRY;
1052
1053         /* req is swabbed so this is safe */
1054         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1055         if (!(body->valid & OBD_MD_FLEASIZE))
1056                 RETURN(0);
1057
1058         if (body->eadatasize == 0) {
1059                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1060                 GOTO(out, rc = -EPROTO);
1061         }
1062
1063         /* The MDS sent back the EA because we unlinked the last reference
1064          * to this file. Use this EA to unlink the objects on the OST.
1065          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1066          * check it is complete and sensible. */
1067         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1068                                               body->eadatasize);
1069         LASSERT(eadata != NULL);
1070
1071         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1072         if (rc < 0) {
1073                 CERROR("obd_unpackmd: %d\n", rc);
1074                 GOTO(out, rc);
1075         }
1076         LASSERT(rc >= sizeof(*lsm));
1077
1078         rc = obd_checkmd(ll_i2dtexp(dir), ll_i2mdexp(dir), lsm);
1079         if (rc)
1080                 GOTO(out_free_memmd, rc);
1081
1082         OBDO_ALLOC(oa);
1083         if (oa == NULL)
1084                 GOTO(out_free_memmd, rc = -ENOMEM);
1085
1086         oa->o_id = lsm->lsm_object_id;
1087         oa->o_gr = lsm->lsm_object_gr;
1088         oa->o_mode = body->mode & S_IFMT;
1089         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1090
1091         if (body->valid & OBD_MD_FLCOOKIE) {
1092                 oa->o_valid |= OBD_MD_FLCOOKIE;
1093                 oti.oti_logcookies =
1094                         req_capsule_server_sized_get(&request->rq_pill,
1095                                                      &RMF_LOGCOOKIES,
1096                                                    sizeof(struct llog_cookie) *
1097                                                      lsm->lsm_stripe_count);
1098                 if (oti.oti_logcookies == NULL) {
1099                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1100                         body->valid &= ~OBD_MD_FLCOOKIE;
1101                 }
1102         }
1103
1104         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir));
1105         OBDO_FREE(oa);
1106         if (rc)
1107                 CERROR("obd destroy objid "LPX64" error %d\n",
1108                        lsm->lsm_object_id, rc);
1109  out_free_memmd:
1110         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1111  out:
1112         return rc;
1113 }
1114
1115 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1116                              struct dentry *dchild, struct qstr *name)
1117 {
1118         struct ptlrpc_request *request = NULL;
1119         struct md_op_data *op_data;
1120         int rc;
1121         ENTRY;
1122         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1123                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1124
1125         /*
1126          * XXX: unlink bind mountpoint maybe call to here,
1127          * just check it as vfs_unlink does.
1128          */
1129         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1130                 RETURN(-EBUSY);
1131
1132         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1133                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1134         if (IS_ERR(op_data))
1135                 RETURN(PTR_ERR(op_data));
1136
1137         ll_get_child_fid(dir, name, &op_data->op_fid3);
1138         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1139         ll_finish_md_op_data(op_data);
1140         if (rc)
1141                 GOTO(out, rc);
1142
1143         ll_update_times(request, dir);
1144
1145         rc = ll_objects_destroy(request, dir);
1146  out:
1147         ptlrpc_req_finished(request);
1148         RETURN(rc);
1149 }
1150
1151 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1152                              struct dentry *src_dchild, struct qstr *src_name,
1153                              struct inode *tgt, struct dentry *tgt_dparent,
1154                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1155 {
1156         struct ptlrpc_request *request = NULL;
1157         struct ll_sb_info *sbi = ll_i2sbi(src);
1158         struct md_op_data *op_data;
1159         int err;
1160         ENTRY;
1161         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1162                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1163                src->i_ino, src->i_generation, src, tgt_name->len,
1164                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1165
1166         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1167             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1168                 RETURN(-EBUSY);
1169
1170         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1171                                      LUSTRE_OPC_ANY, NULL);
1172         if (IS_ERR(op_data))
1173                 RETURN(PTR_ERR(op_data));
1174
1175         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1176         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1177         err = md_rename(sbi->ll_md_exp, op_data,
1178                         src_name->name, src_name->len,
1179                         tgt_name->name, tgt_name->len, &request);
1180         ll_finish_md_op_data(op_data);
1181         if (!err) {
1182                 ll_update_times(request, src);
1183                 ll_update_times(request, tgt);
1184                 err = ll_objects_destroy(request, src);
1185         }
1186
1187         ptlrpc_req_finished(request);
1188
1189         RETURN(err);
1190 }
1191
1192 #ifdef HAVE_VFS_INTENT_PATCHES
1193 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1194 {
1195         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1196 }
1197 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1198 {
1199         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1200                                  NULL, &srcnd->last,
1201                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1202                                  NULL, &tgtnd->last);
1203 }
1204 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1205 {
1206         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1207                                &tgtnd->last, NULL);
1208 }
1209 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1210 {
1211         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1212 }
1213 static int ll_rmdir_raw(struct nameidata *nd)
1214 {
1215         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1216                                 &nd->last);
1217 }
1218 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1219 {
1220         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1221 }
1222 static int ll_unlink_raw(struct nameidata *nd)
1223 {
1224         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1225                                  &nd->last);
1226 }
1227 #endif
1228
1229 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1230                     ll_dev_t rdev)
1231 {
1232         return ll_mknod_generic(dir, &dchild->d_name, mode,
1233                                 old_encode_dev(rdev), dchild);
1234 }
1235
1236 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1237 {
1238         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1239 }
1240 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1241 {
1242         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1243 }
1244 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1245 {
1246         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1247 }
1248 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1249                       const char *oldname)
1250 {
1251         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1252 }
1253 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1254                    struct dentry *new_dentry)
1255 {
1256         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1257                                new_dentry);
1258 }
1259 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1260                      struct inode *new_dir, struct dentry *new_dentry)
1261 {
1262         int err;
1263         err = ll_rename_generic(old_dir, NULL,
1264                                  old_dentry, &old_dentry->d_name,
1265                                  new_dir, NULL, new_dentry,
1266                                  &new_dentry->d_name);
1267         if (!err) {
1268 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1269                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1270 #endif
1271                         d_move(old_dentry, new_dentry);
1272         }
1273         return err;
1274 }
1275
1276 struct inode_operations ll_dir_inode_operations = {
1277 #ifdef HAVE_VFS_INTENT_PATCHES
1278         .link_raw           = ll_link_raw,
1279         .unlink_raw         = ll_unlink_raw,
1280         .symlink_raw        = ll_symlink_raw,
1281         .mkdir_raw          = ll_mkdir_raw,
1282         .rmdir_raw          = ll_rmdir_raw,
1283         .mknod_raw          = ll_mknod_raw,
1284         .rename_raw         = ll_rename_raw,
1285         .setattr            = ll_setattr,
1286         .setattr_raw        = ll_setattr_raw,
1287 #endif
1288         .mknod              = ll_mknod,
1289         .lookup             = ll_lookup_nd,
1290         .create             = ll_create_nd,
1291         /* We need all these non-raw things for NFSD, to not patch it. */
1292         .unlink             = ll_unlink,
1293         .mkdir              = ll_mkdir,
1294         .rmdir              = ll_rmdir,
1295         .symlink            = ll_symlink,
1296         .link               = ll_link,
1297         .rename             = ll_rename,
1298         .setattr            = ll_setattr,
1299         .getattr            = ll_getattr,
1300         .permission         = ll_inode_permission,
1301         .setxattr           = ll_setxattr,
1302         .getxattr           = ll_getxattr,
1303         .listxattr          = ll_listxattr,
1304         .removexattr        = ll_removexattr,
1305 };
1306
1307 struct inode_operations ll_special_inode_operations = {
1308 #ifdef HAVE_VFS_INTENT_PATCHES
1309         .setattr_raw    = ll_setattr_raw,
1310 #endif
1311         .setattr        = ll_setattr,
1312         .getattr        = ll_getattr,
1313         .permission     = ll_inode_permission,
1314         .setxattr       = ll_setxattr,
1315         .getxattr       = ll_getxattr,
1316         .listxattr      = ll_listxattr,
1317         .removexattr    = ll_removexattr,
1318 };